共 24 条
- [1] Allen C. W., 1973, ASTROPHYSICAL QUANTI
- [2] STRATIFICATION EFFECTS IN PLANETARY NEBULA NGC 7009 [J]. ASTROPHYSICAL JOURNAL, 1975, 197 (01) : 175 - 184
- [4] BARKER T, 1977, PREPRINT
- [7] DANZIGER J, 1977, PREPRINT
- [9] GRANDI S, 1975, THESIS U ARIZONA
- [10] EXCITATION OF PERMITTED LINES IN GASEOUS NEBULAE [J]. ASTROPHYSICAL JOURNAL, 1976, 206 (02) : 658 - 671